import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'

Vue.use(VueRouter)


const router = new VueRouter({
  routes :[
    { path : '/', redirect:'/login'},
    { path : '/login', component : Login },
    { path : '/home', component:Home }
    ]

})
 
// 挂载路由导航守卫
router.beforeEach((to,from,next)=>{
  // to  将要访问的路径  from 代表哪个路径跳转而来   
  // next 一个函数 表示放行 next（‘ /login’）强制跳转
  if(to.path === '/login')return next();
  const tokenStr = window.sessionStorage.getItem("token")
  if(!tokenStr) return next('/login')
  next()
})
export default router
